July 29.--At day-light sent a man on horseback to search for our missing companions up the river, as we thought we had heard a musquet in that direction in reply to one of ours. The man shortly returned, having met with two men whom I had seen yesterday looking for their horses; they had been joined by Mr. Cunningham, and had encamped about half a mile higher up the stream than ourselves: of Mr. Evans's party, consisting besides himself of five men, they had heard or seen nothing, nor had they fallen in with any of their marks. At half-past eight o'clock I proceeded with the horses up the river to join the two men, expecting also that Mr. Evans would certainly return downwards when he found that we did not join him. It was twelve o'clock before we found him, and we then proceeded up the river, whilst one man and myself went to a clear hill in the range of Mount Byng, and from which we expected a good prospect. We passed over a large plain, washed by the river; the soil, a stiff red clayey loam, long parched by drought; the sides of the hill light red sandy loam. Small blue gum-trees, box, cypress, and a multitude of acacia shrubs of various species, were the usual productions of the drier and more elevated grounds. Our expectations of an extensive prospect from the top of the hill were not disappointed: we had a distinct view round the compass. The river wound close under the foot of the hill, and trending to the south-east through low marshy grounds covered with atriplex bushes and the acacia pendula, evidently and distinctly showed that it originated in the separated branches of the Lachlan, which it is probable united fifteen or twenty miles below Mount Cunningham, forming the present stream. The north-east side of the river was equally low and marshy. All the points which had been set at Mount Cunningham were distinctly recognised, and bearings being now taken to them, served to correct and prove the survey. The bearings taken from this hill, named Piper's Hill, were as follows by the theodolite: Mount Cunningham E. 9 deg. 20 min. S. Mount Meyrick S. 67 10 E. Mount Maude S. 62 0 E. Table Hill S. 4 30 E. Line of Mount Byng, called Watson Taylor's range E. 7 0 W. Mount Granard N. 79 0 W. Mount Barrer N. 68 0 W. about the same distance as Mount Granard. Extreme of a high range from N. 59 1/2 W., to N. 24 1/2 W.; nearest extreme distance about thirty miles, westward 45. Extremes of another range from N. 10. W., to N. 2. W., about twelve miles long; another range, N. 3. E. to N. 50 1/2 E Hurd's Peak, N. 72. E.; a mount north of it (Mount Hawkins), N. 71. 15. E.; a distant one, N. 86 1/2 E (Mount Riley). Low ranges in N. 44. E., N. 35. E. and N. 26 1/2 E., all the intermediate spaces being low level land.